Analysis of the reasons for increased resistance in the primary cooler
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Recently, the resistance of the primary cooler in our company has been consistently high. In the past, after passing hot gas through it, the resistance would drop below 400, and it would remain at that level for over 20 days with little change. But now, it rises to 800–900 within just two or three days, and it can even reach 1500–2500 during coal loading. What’s causing this? Please give me some help, thank you!
1、Poor quality of gas； 2. High gas consumption ； 3. The spray liquid in the primary cooler has a low tar content ； 4. Low spray volume in the primary cooler ； 5. Severe blockage between pipes. It doesn’t seem too serious for now; pay close attention to conducting inspections and following the specific procedures.
Also, make sure the temperature of the water supplied to the upper circulation section is not too low; it should generally be between 28-32 degrees. To adjust this temperature, only the flow rate can be used, while the temperature of the gas in the middle section should be kept between 35-45 degrees
Our plant uses 4.3-meter ramming equipment; it has one unit with 50 holes, and the cross-sectional area is 3,200 square meters. A few years ago, the load utilization was only 60%. The primary cooling unit also gets clogged frequently; it needs to be cleaned with hot water every 2–3 months. Later, I introduced hot ammonia water for spraying in the upper section, and the results were much better; it is washed once a year. You can give it a try.
Check whether the volatiles content of the blended coal has increased Let’s see if the spraying flow rate has increased Is the temperature too low after a while?
It’s winter now; does your factory use heated water for heating? This might increase resistance, but things will get better when it gets colder